Problem of Import/Outport skin weight. Need help!

[hinatia]

Hi guy.
I was in trouble with Maya Import/outpout skin weight maps.I outported this gril's weight as IFF image with 1200X1200 res,but when I imported with this skin weight and then found sth strange.I means that some
vertex weght was changed.Of cource I haven't change anything
in this scene but only Imported and outpored skin weight.Oh man this prolbem would drive me crazy.Some one can tell me what happeded?
I've got some screen shot here.
BEFORE IMPORT SKIN WEIGHT:

AFTER:

[deke-kincaid]

Maya uses the uv's on your object to export out the skin weights. So if your object has any overlapping uv's or no uv's there will be a problem. Also you want to make sure you export the maps at a high enough resolution to retain the detail, especially if your UV's are poorly laid out.

Personally I wouldn't even export skin weights. Instead make a duplicate of your entire model, do your modification and then use the "Tranfer" command to move your weights from the original to the duplicate object. It does not write out maps and instead works spacially. So you have less of a chance to loose any data.

[goggle]

I'm with Beaker, ditch the weight maps.

There's a handy-dandy script here on highend called, IIRC, weight tools. It lets you write out a text file of how much each point is weighted to each joint. And, naturally, import those weights back in. In this way it's much more accurate than the default weight maps that rely on UVs and map resolution.

Hope this helps.
-James

[hinatia]

Thanks you very much,and Arcsecond too.The mel works perfectly.

[jessec]

Anybody have a link to the IIRC weight tools script? I couldn't find it, browsing around and searching google for it.

[goggle]

linky linky

-James